Reciprocating pump



1965 w. DETTINGER ETAL 3,216,365

RECIPROCATING PUMP Filed July 22, 1963 3 Sheets-Sheet 2 FIGA ( INVENTORSWILL! .DETT/NGEE AUGUST WEHMEIE'E 'JOSEF' (1008 Nov. 9, 1965 w.DETTINGER ETAL RECIPROCATING PUMP Filed July 22, 1963 FIG.5

S Sheets-Sheet 3 INVENTORS WILL! .DETTINGEK AUGUST WEHMEIER JOSEF' JOOSUnited States Patent 3,216,365 RECIPROCATING PUMP Willi Dettinger,August Wehmeier, and Josef Joos, Uracil, Wurttemberg, Germany, assignorsto Pumpenfabrik Urach, Urach, Wurttemberg, Germany Filed July 22, 1963,Ser. No. 296,508 Claims priority, application Germany, July 26, 1962, P29,907 15 Claims. (Cl. 103-153) The invention relates to a reciprocatingpump, and more particularly but not exclusively to a multi-cylinderhigh-pressure reciprocating pump, for pumping for example chemical orother fluids (i.e. liquids or gases) under high pressures (e.g. 583 to2859 p.s.i.), or at high temperatures (cg. 100 to 250 C. in the case offeed water for steam boilers).

One object of the invention is to provide a construction of areciprocating pump which facilitates the problem of pump overhaul.

According to the invention there is provided a reciprocating pump for afluid, including a main housing and a cylinder housing block detachablyconnected thereto, a pumping plunger which is reciprocable in a pumpingchamber in said cylinder housing block, said cylinder housing blockhaving formed therein a fluid inlet orifice and a fluid outlet orificefor said pumping chamber and registering respectively with a fluidsupply orifice and a fluid delivery orifice in said main housing.

With such a pump, by detaching the cylinder housing block from said mainhousing, the fluid supply and delivery ducts to the cylinder housingblock are disconnected and there is no need separately to un-conplefluid supply and delivery connections to the cylinder housing block.

The invention will be further described, by way of example, withreference to the accompanying drawings in which:

FIG. 1 is a diagrammatic side view of a high pressure reciprocatingpump;

FIG. 2 is an axial cross-section of part of the pump of FIG. 1,

FIG. 3 shows on the left hand side a cross section of a manifold blocktaken on the line 33 of FIG. 2, and shows on the right hand side an endview of the manifold block looking from left to right in FIG. 2,

FIG. 4 is a partial top view of the pump; and FIG. 5 is a partiallysectioned side view of a modification of the pump according to theinvention.

The pump of FIG. 1 comprises a drive housing block 10, serving interalia to mount the crank shaft, three cylinder housing blocks 11 (onlyone of which is shown in FIG. 1) each cylinder housing block beingintegrally formed and consisting of a cylinder 11a and a cylinder head11b, and a manifold block 12, the blocks 10, 11 and 12 beinginter-connected as hereinafter described. The drive housing block 10,which may be in one or several parts and may be mounted on firmfoundations, serves to support the other blocks, and contains inaddition to the crankshaft, three reciprocating crossheads,corresponding to the number of cylinders 11a, and actuated from thecrankshaft by connecting rods or the like, one of the cross-heads beingshown partly at 13 in FIG. 2. A chamber 14 (ie an antechamber), which isaccessible through the open top side thereof, separates the part a inwhich the cross-heads are located from the part 1012 of the drivehousing block 10, to which the manifold block 12 is connected.

The part 1011 of the drive housing block 10 has three bores 15, each ofwhich is located axially relative to a respective cross-head 13. Eachbore 15 receives within the inner cylindrical surface 16 thereof, arespective one of the cylinders 11a. Each cylinder 11a has twocylindrical sealing surfaces 17 and 18, forming a contlnuatlor of thecylindrical surface 16, over which the manifold block 12 is fitted bymeans of corresponding cylindrical bores 17a and 18a. These lastmentioned bores may be made, for example, together with the bores 15,Whilst the manifold block 12 is mounted on the drive housing block 10.Conveniently, the cylindrical surfaces 18, 18a have a slightly largerdiameter than the cylindrical surfaces 17, 17a in order to facilitatethe extraction of each cylinder 11a from the manifold block 12, and tomake this extraction possible even if deposits of scale have been formedon the cylindrical surfaces 17a. Sealing rings 19 and 20 seal a coolingwater chamber 12a which is formed between each cylinder 11a and themanifold block 12.

Furthermore, the part 10b has a sealing surface 21 which is exactlyperpendicular to the axes of the cylinders 11a, and which is engaged bya complementary surface of the manifold block 12. Each cylinder head 11bprojects radially outwardly from the associated cylinder 11a, and has asealing surface 22 which is planar and parallel to the sealing surface21, and which abuts a complementary surface 22a of the manifold block12.

The manifold block 12 is connected to the block 10 by screws 23 (e.g.socket head cap screws) the heads 23a of the screws 23 lying incountersunk recesses formed in the block 12 so that they do not protrudeoutwardly of the surface 22a. The cylinder housing blocks 11 areconnected to the block 12 individually by screws 24, 24a.

Each cylinder 11a contains a plunger 25, which is sealed against thecylinder 11a by a stufling box seal comprising sealing sleeves 27, thelatter being compressed by a screw 26. Each plunger is connected to therespective cross head 13 by a detachable, laterally adjustable coupling28 in order to take up manufacturing tolerances. Thus the plunger 25shown in FIG. 2 has an extension 29 with a flange 30 which abuts a slide31, the latter holding a twopart sleeve or bush 33, in engagement withan annular groove 32 formed in the extension 29. Plate springs 34 arecompressed between the two-part bush 33 and a screwed bush 35 insertedinto a bore of the cross-head 13.

Each cylinder head 11!) contains an intake valve 36 in a valve housinginsert 37, and a delivery valve 38 in a valve housing insert 39, theseinserts 37 and 39 being mounted in a vertical bore 40 of the cylinderhead 11b. The interior of each insert 37, 39 communicates with thepumping chamber 41 of the plunger 25.

The intake valve 36 controls the intake or suction duct 42, whichterminates in an orifice 43 at the sealing face 22 of the cylinder head11b. The orifice 43 registers with an orifice which is formed in thesurface 22a. and which leads to a suction duct 44 in the manifold block12, the joint being sealed peripherally by a sealing ring 45.

The delivery valve 38 leads through bores in the valve housing insert 39to an annular chamber 46 which communicates with an orifice bore 47leading to the sealing face 22 of the cylinder head 11b. The orifice 47registers with a further orifice which is formed in the surface 22a andwhich leads to a delivery duct 48 for the pressurized fluid medium, thejoint being sealed peripherally by a sealing ring 49. The delivery duct48 has a smaller crosssection than the intake duct 44, and both ductsextend normal to the axis of each cylinder 11a and, as shown clearly inFIG. 3, both ducts extend across the whole row of the three cylinders11a.

For reasons of accessibility, the screws 24 are fitted from the right inFIG. 2, whilst the screws 24a are fitted from the left on the upper sideof the pump.

The coupling 28 is easily accessible from the open upper side of thechamber 14 (which side may be closed by a removable cover as shown inFIG. 2), so that each .unger 25 may be easily separated from therespective 'oss-head 13.

As may be seen, each cylinder housing block 11 and 1e associated plungermay be removed together from the ump after removing the respectivescrews 24 and 24a, nd after uncoupling the respective coup-ling 28. The:moved assembly will include the seal 26, 27, and the alves 37, 38, andcan be immediately replaced by an exhange unit. The seal 26, 27 may thenbe removed from 1e detached unit after extracting the plunger 25, and aew seal can be fitted. The valves 36, 38 may be reround or replaced bynew ones. Also the plunger may e replaced or repaired. Furthermore, thesealing rings 9, 20 can be replaced. New sealing rings 45, 49 can betted before the exchange unit is secured to the pump.

Normally the replacement of a cylinder housing block .1 and associatedplunger 25 will be effected after ex- =:rnal valves (not shown) locatedin the intake and deivery pipes leading respectively to and from thepump rave been closed. The fact that the intake and delivery iipes aredirectly connected to the manifold block 12 and lot to cylinder housingblocks 11 enables quick removal .nd replacement of each cylinder housingblock and as- .ociated plunger. Thus the pump need only be inoperaivefor a short time, which can be of great importance [1 the case of pumpswhich are used for feeding water to team boilers, or in the case ofpumps which one used in he chemical industry in connection with carryingout :ontinuous chemical processes. It will be seen that when 1. cylinderhousing block and associated pump are being 'eplaced, there is virtuallyno risk that the fluid medium aeing pumped will enter the chamber 14.Furthermore t will be seen that the overhaul of a removed cylinderlousing block and associated plunger can be effected with- )ut urgency,so that due care can be taken to ensure that ;he seal 27 is arranged andoperates precisely as desired.

The pump which has been described can be modified 9y fitting an annularheating or cooling plate in the joint Jetween the sealing faces 22, 22a.As shown in FIG. the plate 50 is sandwiched between the sealing surfacesof the cylinder head portion 11b and that of the main housing 11; it isprovided with orifices 42a and 47a therethrough which respectivelyestablish communication between the fluid supply orifice and the fluidinlet orifice on the one hand, and between the fluid outlet orifice andthe fluid delivery orifice on the other. Plate 50 is further providedwith a passage 51 in which heating means, such as for instance anelectrical heating spiral 52, may be located. Such a heating plate maybe used with media e. g. tar-which are highly viscous or even solid atordinary room temperature. Of course it is also possible to use theplate for cooling purposes, in which case it is merely necessary toprovide a cooling means-e.g. an electric cooling means or a coolingfluidinstead of the heating means. The heating or cooling by such aheating or cooling plate is particularly effective, because the plate islocated close to the pumping chamber 41, and the medium being pumpedflows in contact with the plate. The cylinder 11a and the plunger 25have a longer configuration in these constructions to allow for theadditional thickness of the plate.

We claim:

1. A reciprocating pump for a fluid, including a main housing with abore extending therethrough, a cylinder housing block comprising ahollow cylinder portion and a hollow cylinder head portion, saidcylinder portion extending within and being located by said bore, andsaid cylinder head portion extending radially outwardly of said cylinderportion, said cylinder head portion and said main housing havingcomplementary co-operating sealing surfaces, detachable connecting meanssecuring said cylinder housing block to said main housing and holdingsaid sealing surfaces in co-operating relationship, a pumping plungerwhich is reciprocable in sealing relationship within said cylinderportion, said plunger having an end face facing said cylinder headportion, a pumping chamber in said cylinder housing block, said pumpingchamber being in part defined by said end face of said plunger, a fluidinlet orifice and a fluid outlet orifice in said cylinder head portionfor said pumping chamber, said fluid inlet and outlet orifices extendingfrom said sealing surface of said cylinder portion, a fluid supplyorifice and a fluid delivery orifice in said main housing and extendingfrom said sealing surface thereof, said fluid supply orifice registeringand communicating with said fluid inlet orifice, and said fluid outletorifice registering and communicating with said fluid delivery orifice.

2. A pump as claimed in claim 1 in which said sealing surfaces extend atright angles to the reciprocating axis of said plunger.

3. A pump as claimed in claim 1 in which said cylinder head portionincorporates a one-way inlet valve and a one-way outlet valve, saidinlet valve controlling communication in one direction from said fluidinlet orifice to said pumping chamber, and said outlet valve controllingcommunication in one direction from said pumping chamber to said fluidoutlet orifice.

4. A pump as claimed in claim 1 including a heat transfer platesandwiched between said sealing surfaces, said plate having portsextending therethrough and establishing communication respectivelybetween said fluid supply orifice and said fluid inlet orifice, andbetween said fluid outlet orifice and said fluid delivery orifice.

5. A reciprocating pump for a fluid, comprising a main housingconsisting of a drive housing block and a manifold block, said manifoldblock being connected to said drive housing block, drive means supportedby said drive housing block, said drive housing block and said manifoldblock defining successive axial sections of a bore extendingtherethrough, a cylinder housing block comprising a hollow cylinderportion and a hollow cylinder head portion, said cylinder portionextending within and being located by said bore, and said cylinder headportion extending radially outwardly of said cylinder portion, saidcylinder head portion and said manifold block having complementarysealing surfaces, detachable connecting means securing said cylinderhousing block to said manifold block and holding said sealing surfacesin co-operating relationship, said manifold block being located betweensaid drive housing block and said cylinder head portion, a pumpingplunger which is reciprocable by said drive means in sealingrelationship within said cylinder portion, said plunger having an endface facing said cylinder head portion, a pumping chamber in saidcylinder housing block, said pumping chamber being in part defined bysaid end face of said plunger, a fluid inlet orifice and a fluid outletorifice in said cylinder head portion for said pumping chamber, saidfluid inlet and outlet orifices extending from said sealing surface ofsaid cylinder portion, a fluid supply orifice and a fluid deliveryorifice in said main housing and extending from said sealing surfacethereof, said fluid supply orifice registering and communicating withsaid fluid inlet orifice, and said fluid outlet orifice registering andcommunicating with said fluid delivery orifice.

6. A pump as claimed in claim 5 in which said manifold block and saidcylinder portion define ther-ebetween a coolant passage.

7. A pump as claimed in claim 5 in which said manifold block and saiddrive housing block have complementary co-operating sealing surfaces.

8. A pump as claimed in claim 5 in which said cylinder head portionincorporates a one-way inlet valve and a one-way outlet valve, saidinlet and outlet valves being vertically aligned, said inlet valvecontrolling communication in one direction from said fluid inlet orificeto said pumping chamber, and said outlet valve controlling communicationin one direction from said pumping chamber to said fluid outlet orifice,said cylinder head portion having an opening in the upper end thereofthrough which said inlet and outlet valves are accessible, removableclosure means closing said opening, said detachable connecting meansincluding horizontal .bolts which extend through said manifold block andare screwed into the upper end of said cylinder head portion.

9. A reciprocating pump for a fluid, comprising a main housingconsisting of a drive housing block and a manifold block, said manifoldblock being connected to said drive housing block, drive means supportedby said drive housing block, said drive housing block and said manifoldblock defining successive axial sections of at least two horizontalbores extending therethrough co-extensively and in the same horizontalplane, a plurality of cylinder housing blocks corresponding to thenumber of said bores, each cylinder housing block comprising a hollowcylinder portion and a hollow cylinder head portion, each said cylinderportion extending within and being located by a respective one of saidbores, each said cylinder head portion extending radially outwardly ofthe associated cylinder portion, and each said cylinder head portion andsaid manifold block having complementary sealing surfaces, detachableconnecting means securing each said cylinder housing .block to saidmanifold block and holding said sealing surfaces in co-operatingrelationship, whereby said cylinder housing blocks are disposed in ahorizontal bank, said manifold block being located between said drivehousing block and said cylinder head portions, a plurality of pumpingplungers corresponding to the number of cylinder portions, each pumpingplunger being reciprocable by said drive means in sealing relationshipwithin a respective one of said cylinder portions and each plungerhaving an end face facing the respective cylinder head portion, apumping chamber in each said cylinder housing block, said pumpingchamber being in part defined by the end face of the associated plunger,each cylinder head portion having therein a fluid inlet orifice and afluid outlet orifice for the associated pumping chamber and extendingfrom said sealing surface of that cylinder head portion, said manifoldblock having therein a plurality of fluid supply orifices and aplurality of fluid delivery orifices, said fluid supply and deliveryorifices extending from said sealing surface of said manifold block,said fluid supply orifices corresponding in number and registering andcommunicating with said fluid inlet orifices, and said fluid deliveryorifices corresponding in number and registering and communicating withsaid fluid outlet orifices, said manifold block defining internallythereof a common supply duct and a common delivery duct, all said fluidsupply orifices communicating with said common supply duct, and all saidfluid delivery orifices communicating with said common delivery duct.

10. A pump as claimed in claim 9 in which said common supply duct andsaid common delivery duct extend horizontally and at right anglestransversely to said bores,

11. A pump as claimed in claim 10 in which s2 common supply duct islocated below said bores, and s2 common delivery duct is located abovesaid bores.

12. A pump as claimed in claim 9 in which sa common supply duct has agreater cross section than sa common delivery duct.

13. A reciprocating pump for a fluid, including a ma housing with a boreextending therethrough, a cylind housing block comprising a hollowcylinder portion a1 a hollow cylinder head portion, said cylinderportion e tending Within and being located by said bore and sa cylinderhead portion extending radially outwardly of sa cylinder portion, saidcylinder head portion and said ma housing having complementarycooperating sealing su faces, detachable connecting means securing saidcylind' housing block to said main housing and holding sa sealingsurfaces in cooperating relationship, a pumpir plunger reciprocable insealing relationship within sa cylinder portion, said plunger having anend face facir said cylinder head portion, a pumping chamber in sa:cylinder housing block, said pumping chamber being 1 part defined bysaid end face of said plunger, at least or fluid orifice in saidcylinder head portion for said pumpir chamber, said fluid orificeextending from said sealir surface of said cylinder portion, at leastone addition: fluid orifice in said main housing and extending from saisealing surface thereof and registering with said first mer tioned fluidorifice.

14. A pump as claimed in claim 13 in which said sea ing surfaces extendtransversely to the axis of said plunge:

15. A pump as claimed in claim 13 and including sea ing means in saidhollow cylinder portion surrounding sai plunger, drive means supportedby said main housing, dis connectable coupling means connecting saiddrive mean to said plunger, said main housing defining an open-sidechamber in which said coupling means are accessibl located in such amanner that when said coupling mean and said detachable connecting meansare disconnecte the cylinder housing block together with said plunger ansaid sealing means may be removed as a unit from th main housing.

References Cited by the Examiner UNITED STATES PATENTS 2,239,853 4/41Louree 103-169 2,733,664 2/56 Saalfrank 10315E 2,771,037 11/56 Johnston103l52 2,795,191 6/57 Seter 103-153 )1 DONLEY J. STOCKING, PrimaryExaminer.

WARREN E. COLEMAN, LAURENCE V. EFNER Examiners,

1. A RECIPROCATING PUMP FOR A FLUID, INCLUDING A MAIN HOUSING WITH ABORE EXTENDING THERETHROUGH, A CYLINDER HOUSING BLOCK COMPRISING AHOLLOW CYLINDER PORTION AND A HOLLOW CYLINDER HEAD PORTION, SAIDCYLINDER PORTION EXTENDING WITHIN AND BEING LOCATED BY SAID BORE, ANDSAID CYLINDER HEAD PORTION EXTENDING RADIALLY OUTWARDLY OF SAID CYLINDERPORTION, SAID CYLINDER HEAD PORTION AND SAID MAIN HOUSING HAVINGCOMPLEMENTARY CO-OPERATING SEALING SURFACES, DETECHABLE CONNECTING MEANSSECURING SAID CYLINDER HOUSING BLOCK TO SAID MAIN HOUSING AND HOLDINGSAID SEALING SURFACES IN CO-OPERATING RELATIONSHIP, A PUMP PLUNGER WHICHIS RECIPROCABLE IN SEALING RELATIONSHIP WITHIN SAID CYLINDER PORTION,SAID PLUNGER HAVING AN AND FACE FACING SAID CYLINDER HOUSING BLOCK, SAIDPUMPING CHAMBER IN SAID CYLINDER HOUSING BLOCK, SAID PUMPING CHAMBERBEING IN PART DEFINED BY SAID END FACE OF SAID PLUNGER, A FLUID INLETORIFICE AND A FLUID OUTLET ORIFICE IN SAID CYLINDER HEAD PORTION FORSAID PUMPING CHAMBER, SAID FLUID INLET AND OUTLET ORIFICES EXTENDINGFROM SAID SEALING SURFACE OF SAID CYLINDER PORTION, A FLUID SUPPLYORIFICE AND A FLUID DELIVERY ORIFICE IN SAID MAIN HOUSING AND EXTENDINGFROM SAID SEALING SURFACE THEREOF, SAID FLUID SUPPLY ORIFICE REGISTERINGAND COMMUNICATING WITH SAID FLUID INLET ORIFICE, AND SAID FLUID OUTLETORIFICE REGISTERING AND COMMUNICATING WITH SAID FLUID DELIVERY ORIFICE.